I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!

anonymous

5 years ago

use (y2-y1)=m(x2-x1)
where your points are (x1,y1) and (x2,y2)
that will give you m (the slope)
then use (y-y1)=m(x-x1) (or you can use x2, y2 if you choose)
and then solve for y

anonymous

5 years ago

ok whats the second formula called

anonymous

5 years ago

they're both called point-slope formula. they're the same formula essentially, you're just pluggin in different things you know to figure out what you don't know. like, for the first part you know two points but not the slope, so you have to find that.
and in the second part you want the whole equation of the line, but you only need 1 point and the slope.